Lamp shade



Dec. 4 1923.

E. H. STRAUSS LAMP SHADE Filed March 18. 1920 6 INVENTOR. ama aifizfzwsZTT R A if.

Patented Dec, 4, 1923.

PATENT OFFICE.

ERNEST I-I. s'ranoss, or onrc'eeo, ILLINOIS.-

LAJEI? SHADE.

Application filed March 18, 1920; Serial No. 366,766.

2" 0 all whom it may concern:

Be it known that I, ERNns'r ii. STRAUss, a citizen of the United Statesof America.

residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Lamp- Shades, of whichthe following is a specification.

My invention relates to lamps generally, but particularly to lamps-at orin the direction of which it is sometimes necessary to look, and has forits objects the production of a shade and diffuser which will afford themaximum of light in a given direction, with a minimum of glare to theeyes upon looking at, or in the direction of the lamp, and at the sametime be adequately ventilated.

I attain these objects by a device illustrated in the accompanyingdrawings, in which Fig. 1 is an elevation of the device in circular orsquare form, or of an end of the device in oblong form; Fig. 2, across-section of the same, showing several variants of the diffuser, andthe source of the light in diagram; Fig. 3, a plan view of the diffuserin circular form; Fig. 4, a like view of an indefinite section in oblongor longitudinal form, Figs. 5 and 6, like views of termini of suchforms, andFig. 7, a section of the device in one-piece form. The samereference characters refer to the same, similar or corresponding partsthroughout the various views.

The device consists of a diffuser and a reflector, or reflector-shade,either separate or continuous, disposed on opposite sides of an electricbulb, or other source of light, the former comprising several ring ortubelike members of mat or frosted glass of varying length, but allrelatively short, and so disposed about a plane, curved or angularmiddle member of the same material, and with reference to it, eachother, and the source of the light, as to intercept all the raysemanating directly therefrom in the general direction thereof, saidmembers being intersected and joined, preferably at right angles, andrigidly held in place by relatively slender links of clear glass,resulting, when viewed in plan, in a sash-like whole with relativelylarge interstices, openings or spaces between the intersections for thepassage of reflected rays, and for ventilation, while the reflector orthe reflectorsbade is a conventional canopy or inverted bowl or funnelof glass, metal or other suitable material, according to theeffect'dcsired, with its inner surface silvered or otherwise treated soas to act as a reflector.

Referring to the drawings, A is the diffuser proper, A, A" and A beingvari ants; B, the reflector and C, the shade. D, D and D represent themembers of the diffuser that are mat or frosted, E, the connectinglinks, and F, the intervening spaces,

while Gr represents the source of the light.

It will be observed from a reference to the broken lines, my, (Figs. 2and 7 ),that all rays of light emanating directly from the source, G, inthe general direction of the diffuser, will be'intercepted by thefrosted or mat members, D, D and D, and by them broken up and diffused,thus preventing all glare to the eyes upon looking at or in thedirection of the said source; while most of the reflected rays, (thereflector being properly shaped and placedwith reference to saidsource), will pass unimpeded through the spaces and clear glass, E andF, affording the maximum of light in the general direction of thediffuser, as well as the desired ventilation.

If the source of the light, or the conditions of its use are such as torequire its protection from the elements, or environment, or if desiredfor other reason, the interstices or openings, F, may be closed withclear glass, after the general manner of panes in a window-sash, asshown by the dotted lines, m, (Fig. 2), and at F, (Figs. 2 A, 4, 5, 6and 7) and in such case, the links E, may be and generally are entirelyomitted, and resort had to a form of diffuser such as is shown at A,(Figs. 2 and 7), in which F represents transparent or clear glass,serving both to connect and hold the frosted or mat parts in place andto closethe intervening spaces against wind and weather, and whateverforeign substances may be borne thereon or thereby.

If the reflector or reflector-shade is made of glass, it is preferablymade continuous with the diffuser, or the outer member thereof,resulting in a one-piece unit or whole, as shown in Fig. 7.

Having thus described my invention, what i approximately parallel lines,and a diffuser sively larger but narrower vertical-walled surroundingmembers of translucent but not transparent material,concentricallymounted, and spaced from one another in approximately thesame horizontal plane, to intercept and diffuse all rays emanatingdownward directly from said source, and afford relatively large andunimpeded passage for said reflected rays, andslender means spanningsaid spaces and firmly attached to said members to hold them inposition, said spaces being otherwise'left open for such passage and forventilation, substantially as described and shown.

2. In a lamp-shade, the combination with a reflector of such innercurvature as to reflect'the rays impinging thereagainst from an embracedsource of the light in approximately parallel lines, of a diffusercomprising a central member, and aseries of vertical-walled surroundingmembers, of translucent but not transparent material, the latter beingconsecutively larger but of lower elevation, all said members beingconcentrically mounted and spaced from one another with their upperedges in approximately the same horizontal plane, to intercept anddiffuse all rays'impinging thereupon directly from said source, and, atthe same time, afford relatively large and unimpeded passage for saidreflected rays, and slender -means of suitable material, spanning saidERNEST H. STRAUSS

